Shared demodulation reference signal design for control channels in 5g or other next generation networks

ABSTRACT

Facilitating shared demodulation reference signal design for control channels in a wireless communications system is provided herein. A system can comprise a processor and a memory that stores executable instructions that, when executed by the processor, facilitate performance of operations. The operations can comprise evaluating a usage parameter of a mobile device for application of channel demodulation reference signal reuse by the mobile device. In response to a first determination that the usage parameter satisfies a condition relative to a threshold usage parameter, the operations can comprise facilitating a first transmission to the mobile device to implement the channel demodulation reference signal reuse by the mobile device. In response to a second determination that the usage parameter does not satisfy the condition relative to the threshold usage parameter, the operations can comprise facilitating a second transmission to the mobile device to implement usage of separate channel demodulation reference signals.

RELATED APPLICATION

The subject patent application is divisional of, and claims priority to,U.S. patent application Ser. No. 15/978,319, filed May 14, 2018, andentitled “SHARED DEMODULATION REFERENCE SIGNAL DESIGN FOR CONTROLCHANNELS IN 5G OR OTHER NEXT GENERATION NETWORKS,” the entirety of whichapplication is hereby expressly incorporated by reference herein.

TECHNICAL FIELD

The subject disclosure relates generally to communications systems, andfor example, to demodulation reference signals for control channels anddata traffic channels in 5G or other next generation networks.

BACKGROUND

To meet the huge demand for data centric applications, Third GenerationPartnership Project (3GPP) systems and systems that employ one or moreaspects of the specifications of the Fourth Generation (4G) standard forwireless communications will be extended to a Fifth Generation (5G)standard for wireless communications. Unique challenges exist to providelevels of service associated with forthcoming 5G, or other nextgeneration, standards for wireless communication.

BRIEF DESCRIPTION OF THE DRAWINGS

Various non-limiting embodiments are further described with reference tothe accompanying drawings in which:

FIG. 1 illustrates a block diagram of an example, non-limiting,communications system for facilitating shared demodulation referencesignal design for control channels in accordance with one or moreembodiments described herein;

FIG. 2 illustrates an example, non-limiting representation of a separatedemodulation reference signal using an example of 2-symbolsnon-slot-based scheduling in accordance with one or more embodimentsdescribed herein;

FIG. 3 illustrates an example, non-limiting representation of a shareddemodulation reference signal using an example of 2-symbolsnon-slot-based scheduling in accordance with one or more embodimentsdescribed herein;

FIG. 4 illustrates a block diagram of an example, non-limiting,communications system for dynamically switching between shareddemodulation reference signals and separated demodulation referencesignals in accordance with one or more embodiments described herein;

FIG. 5 illustrates an example, non-limiting, method for shareddemodulation reference signal design for control channels in accordancewith one or more embodiments described herein;

FIG. 6 illustrates an example, non-limiting, method for provisioning amobile device to use a shared demodulation reference signal design or aseparate demodulation reference signal design for control channels inaccordance with one or more embodiments described herein;

FIG. 7 illustrates an example, non-limiting, method for utilization ofan adaptive demodulation reference signal port table in accordance withone or more embodiments described herein;

FIG. 8 illustrates an example, non-limiting, method for dynamicallysupporting sharing of demodulation reference signal between controlchannels and data channels based on a feedback loop in accordance withone or more embodiments described herein;

FIG. 9 illustrates an example block diagram of an example mobile handsetoperable to engage in a system architecture that facilitates wirelesscommunications according to one or more embodiments described herein;and

FIG. 10 illustrates an example block diagram of an example computeroperable to engage in a system architecture that facilitates wirelesscommunications according to one or more embodiments described herein.

DETAILED DESCRIPTION

One or more embodiments are now described more fully hereinafter withreference to the accompanying drawings in which example embodiments areshown. In the following description, for purposes of explanation,numerous specific details are set forth in order to provide a thoroughunderstanding of the various embodiments. However, the variousembodiments can be practiced without these specific details (and withoutapplying to any particular networked environment or standard).

The various aspects described herein can relate to New Radio (NR), whichcan be deployed as a standalone radio access technology or as anon-standalone radio access technology assisted by another radio accesstechnology, such as Long Term Evolution (LTE), for example. It should benoted that although various aspects and embodiments have been describedherein in the context of 5G, Universal Mobile Telecommunications System(UMTS), and/or Long Term Evolution (LTE), or other next generationnetworks, the disclosed aspects are not limited to 5G, a UMTSimplementation, and/or an LTE implementation as the techniques can alsobe applied in 3G, 4G, or LTE systems. For example, aspects or featuresof the disclosed embodiments can be exploited in substantially anywireless communication technology. Such wireless communicationtechnologies can include UMTS, Code Division Multiple Access (CDMA),Wi-Fi, Worldwide Interoperability for Microwave Access (WiMAX), GeneralPacket Radio Service (GPRS), Enhanced GPRS, Third Generation PartnershipProject (3GPP), LTE, Third Generation Partnership Project 2 (3GPP2)Ultra Mobile Broadband (UMB), High Speed Packet Access (HSPA), EvolvedHigh Speed Packet Access (HSPA+), High-Speed Downlink Packet Access(HSDPA), High-Speed Uplink Packet Access (HSUPA), Zigbee, or anotherIEEE 802.XX technology. Additionally, substantially all aspectsdisclosed herein can be exploited in legacy telecommunicationtechnologies.

As used herein, “5G” can also be referred to as NR access. Accordingly,systems, methods, and/or machine-readable storage media for facilitatinglink adaptation of downlink control channel for 5G systems are desired.As used herein, one or more aspects of a 5G network can comprise, but isnot limited to, data rates of several tens of megabits per second (Mbps)supported for tens of thousands of users; at least one gigabit persecond (Gbps) to be offered simultaneously to tens of users (e.g., tensof workers on the same office floor); several hundreds of thousands ofsimultaneous connections supported for massive sensor deployments;spectral efficiency significantly enhanced compared to 4G; improvementin coverage relative to 4G; signaling efficiency enhanced compared to4G; and/or latency significantly reduced compared to LTE.

To meet the huge demand for data centric applications, 4G standards canbe applied to 5G (e.g., NR access). 5G networks can comprise thefollowing: data rates of several tens of megabits per second supportedfor tens of thousands of users; 1 gigabit per second can be offeredsimultaneously to tens of workers on the same office floor; severalhundreds of thousands of simultaneous connections can be supported formassive sensor deployments; spectral efficiency can be enhanced comparedto 4G; improved coverage; enhanced signaling efficiency; and reducedlatency compared to LTE. In a multicarrier system such as OFDM, eachsubcarrier can occupy bandwidth (e.g., subcarrier spacing). If thecarriers use the same bandwidth spacing, then it can be considered asingle numerology. However, if the carriers occupy different bandwidthand/or spacing, then it can be considered a multiple numerology.

Downlink reference signals are predefined signals occupying specificresource elements within a downlink time-frequency grid. There areseveral types of downlink reference signals that can be transmitted indifferent ways and used for different purposes by a receiving terminal.Channel State Information Reference Signals (CSI-RS) can be used byterminals to acquire Channel State Information (CSI) and beam specificinformation (e.g., beam reference signal received power). In 5G, CSI-RScan be User Equipment (UE) specific so it can have a significantly lowertime/frequency density. Demodulation Reference Signals (DM-RS), alsosometimes referred to as UE-specific reference signals, can be used byterminals for channel estimation of data channels. The label“UE-specific” relates to each demodulation reference signal beingintended for channel estimation by a single terminal. The demodulationreference signal can then be transmitted within the resource blocksassigned for data traffic channel transmission to that terminal. Otherthan the previously mentioned reference signals, there are otherreference signals, namely Multi-Cast Broadcast Single Frequency Network(MBSFN) and positioning reference signals that can be used for variouspurposes.

Non-slot-based scheduling (also referred to as mini-slot basedscheduling) has been introduced in NR to reduce the latency of the airinterface. The design is to allow a short Physical Downlink SharedChannel (PDSCH) duration in such scheduling. In non-slot-basedscheduling, the PDSCH duration can be very short. Currently 3GPP hasagreed to support two symbols length, four symbols length, and sevensymbols length (2/4/7 symbols length) of non-slot based PDSCH. With suchshort length of PDSCH, a demodulation reference signal (DMRS) overheadcould become too big. In the worst case, a Physical Downlink ControlChannel (PDCCH) DMRS and a PDSCH DMRS will occupy the first and secondsymbols. In the case of two symbols PDSCH duration, the leftoverResource Elements (REs) for data is very small. Non-slot-basedscheduling utilizes fourteen symbols (e.g., 14 OFDM symbols).

The disclosed aspects can be utilized with both slot-based schedulingand non-slot-based scheduling. Further, the various aspects providedherein can provide a new DMRS table design that can support adaptiveDMRS table switching according to a PDSCH duration length. Also providedherein is a dynamic indication of whether PDCCH DMRS can be reused for aPDSCH channel estimation.

In an embodiment, described herein is a system that can comprise aprocessor and a memory that stores executable instructions that, whenexecuted by the processor, facilitate performance of operations. Theoperations can comprise evaluating a usage parameter of a mobile devicefor application of channel DMRS reuse by the mobile device. In responseto a first determination that the usage parameter satisfies a conditionrelative to a threshold usage parameter, the operations can comprisefacilitating a first transmission to the mobile device to implement thechannel DMRS reuse by the mobile device. In response to a seconddetermination that the usage parameter does not satisfy the conditionrelative to the threshold usage parameter, the operations can comprisefacilitating a second transmission to the mobile device to implementusage of separate channel DMRS's. The channel DMRS reuse can beimplemented for slot-based scheduling and/or for non-slot-basedscheduling.

The channel DMRS reuse can comprise a PDCCH DMRS being reused for PDSCHestimation. According to an example, the second transmission cancomprise an indication for the mobile device to utilize a first DMRS fora data channel and a second DMRS for a control channel.

Facilitating the first transmission can comprise transmitting anindication to implement the channel DMRS reuse as a separate encoded bitin a signal that comprises downlink control information. In anotherexample, facilitating the first transmission can comprise transmittingan indication to implement the channel DMRS reuse as a jointly encodedbit in a DMRS port table that comprises a group of indication bitsincluding the jointly encoded bit.

In an example, the usage parameter can be a speed of the mobile deviceand the threshold usage parameter can be a threshold movement speed ofthe mobile device. In accordance with this example, the operations canfurther comprise, in response to a third determination that the speed ofthe mobile device is less than the threshold movement speed, determiningthat the channel DMRS reuse is to be implemented at the mobile device.Further, in response to a fourth determination that the speed of themobile device is more than the threshold movement speed, the operationscan comprise determining that separate channel DMRS's are to beimplemented at the mobile device.

In another example, the usage parameter can be rank data of the mobiledevice and the threshold usage parameter can be a threshold rank data ofthe mobile device. According to this example, the operations can furthercomprise, in response to a third determination that the rank data isless than the threshold rank data, determining that the channel DMRSreuse is to be implemented at the mobile device. Further, in response toa fourth determination that the rank data is more than the thresholdrank data, the operations can comprise determining that separate channelDMRS's are to be implemented at the mobile device.

According to another example, the usage parameter can be a duration of aPDSCH and the operations can comprise facilitating a third transmissionof a DMRS port table selected from a group of DMRS port tables based onthe duration of the PDSCH. The DMRS port table can comprise anindication for the mobile device to implement the channel DMRS reuse.

According to another embodiment is a method that can comprisedetermining, by a network device of a wireless network, that a usageparameter associated with a mobile device in the wireless networksatisfies a function of a defined usage parameter associated withcontrol channel DMRS reuse. The network device can comprise a processor.The method can also comprise in response to a determination that theusage parameter satisfies the function of the defined usage parameter,transmitting, by the network device to the mobile device, an indicationof usage of a shared DMRS for a data channel and a control channel.

In an example, the indication can be a first indication. Further to thisexample, the method can comprise, in response to determining the usageparameter fails to satisfy the defined usage parameter, transmitting, bythe network device and to the mobile device, a second indication ofusage of a first DMRS for the data channel and a second DMRS for thecontrol channel. The first DMRS and the second DMRS can be separateDMRS's.

In accordance with an example, transmitting the indication can comprisetransmitting the indication as a separate encoded bit in a signal thatcomprises downlink control information.

In another example, the determination is a first determination, and theusage parameter is a movement speed of the mobile device. Further tothis example, the method can comprise measuring, by the network device,the movement speed of the mobile device and comparing, by the networkdevice, the movement speed with a defined movement speed parameter. Themethod can also comprise, in response to a second determination that themovement speed is less than the defined movement speed parameter,determining, by the network device, that the shared DMRS is availablefor use by the mobile device.

According to another example, the determination can be a firstdetermination and the usage parameter can be rank data. In accordancewith this example, the method can comprise evaluating, by the networkdevice, the rank data associated with the mobile device. The method canalso comprise, in response to a second determination that the rank datais rank one, determining, by the network device, that the shared DMRS isavailable for use by the mobile device.

In another example, the usage parameter can be a duration of a PDSCH andthe method can comprise determining, by the network device, the durationof the PDSCH. The method can also comprise transmitting, by the networkdevice to the mobile device, a DMRS port table based on the duration ofthe PDSCH. The DMRS port table can comprise the indication for themobile device to use the shared DMRS for the data channel and thecontrol channel.

According to yet another embodiment, described herein is amachine-readable storage medium, comprising executable instructionsthat, when executed by a processor, facilitate performance ofoperations. The operations can comprise evaluating a usage parameter ofa mobile device for application of channel DMRS reuse by the mobiledevice. The operations can also comprise, in response to a firstdetermination that the usage parameter satisfies a threshold usageparameter, facilitating a first transmission to the mobile device to beused for implementation of the channel DMRS reuse. Further, theoperations can comprise, in response to a second determination that theusage parameter does not satisfy the threshold usage parameter,facilitating a second transmission to the mobile device to be used forimplementation of separate channel DMRS's. In an example, the channelDMRS reuse can comprise a PDCCH DMRS being reused for PDSCH estimation.

According to an implementation, the operations can comprise determininga duration of a PDSCH. The operations can also comprise facilitating athird transmission to the mobile device, the third transmission cancomprise a DMRS port data structure based on the duration of the PDSCH.The DMRS port data structure can comprise an indication for the mobiledevice to implement the channel DMRS reuse. These and other embodimentsor implementations are described in more detail below with reference tothe drawings.

FIG. 1 illustrates a block diagram of an example, non-limiting,communications system 100 for facilitating shared DMRS design forcontrol channels in accordance with one or more embodiments describedherein. The communications system 100 can comprise one or more networkdevices (illustrated as a network device 102) and one or more mobiledevices (illustrated as a mobile device 104). The network device 102 canbe included in a group of network devices of a wireless network.Although only a single mobile device and a single network device areillustrated, the communications system 100 can comprise a multitude ofmobile devices and/or a multitude of network devices.

The network device 102 can comprise an analyzer, illustrated as ananalysis component 106, a transmitter/receiver, illustrated as acommunication component 108, at least one memory 110, and at least oneprocessor 112. Further, the mobile device 104 can comprise atransmitter/receiver 114, at least one memory 116, and at least oneprocessor 118.

The network device 102, via the communication component 108, cancommunicate with the mobile device 104, via the transmitter/receiver114. For example, the network device 102 can communicate referencesignal data associated with a reference signal to the mobile device 104.In addition, the network device 102, via the communication component108, and the mobile device 104, via the transmitter/receiver 114 cancommunicate with other network devices and/or other mobile devices.

The analysis component 106 can determine whether a usage parameter ofthe mobile device 104 satisfies a defined usage parameter. For example,the usage parameter can be a movement speed of the mobile device 104 andthe defined usage parameter can be a defined movement speed. Themovement speed can indicate how fast the mobile device 104 is beingmoved.

In another example, the usage parameter can be a rank data of the mobiledevice and the defined usage parameter can be a defined rank informationparameter. Rank data, or rank information, comprises variouscombinations of the number of transmit antennas and the number oftransmission layers. Channel rank information is a second orderstatistic of the channel and does not change fast, unlike precodingmatrix or Channel Quality Index (CQI) information. The channel rankinformation can be reported by the mobile device 104 as feedbackinformation. The rank information can include a rank indicator, whichindicates the number of streams of information preferred by the mobiledevice.

In yet another example, the usage parameter can be a duration of aPDSCH. Further, the defined usage parameter can be whether the durationcomprises two symbols length, four symbols length, seven symbols length,or fourteen symbols length.

The communication component 108 can be configured to transmit, to themobile device 104, an indication related to whether a shared DMRS shouldbe used for a data channel and a control channel, or whether separateDMRS's should be used for the data channel and the control channel.

The communication component 108 and/or the transmitter/receiver 114 canbe configured to transmit to and/or receive data from the network device102, the mobile device 104, other network devices, and/or other mobiledevices. Through the communication component 108, the network device 102can concurrently transmit and receive data, can transmit and receivedata at different times, or combinations thereof. In a similar manner,through the transmitter/receiver 114, the mobile device 104 canconcurrently transmit and receive data, can transmit and receive data atdifferent times, or combinations thereof.

The respective one or more memories (e.g., the memory 110, the memory116) can be operatively coupled to the respective one or more processors(e.g., the processor 112, the processor 118). The respective one or morememories (e.g., the memory 110, the memory 116) can store protocolsassociated with facilitation of shared DMRS design as discussed herein.Further, the respective one or more memories (e.g., the memory 110, thememory 116) can facilitate action to control communication between thenetwork device 102 and the mobile device 104, such that thecommunications system 100 can employ stored protocols and/or algorithmsto achieve improved communications in a wireless network as describedherein.

It should be appreciated that data store (e.g., memories) componentsdescribed herein can be either volatile memory or nonvolatile memory, orcan include both volatile and nonvolatile memory. By way of example andnot limitation, nonvolatile memory can include Read Only Memory (ROM),Programmable ROM (PROM), Electrically Programmable ROM (EPROM),Electrically Erasable ROM (EEPROM), or flash memory. Volatile memory caninclude Random Access Memory (RAM), which acts as external cache memory.By way of example and not limitation, RAM is available in many formssuch as Synchronous RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM(SDRAM), Double Data Rate SDRAM (DDR SDRAM), Enhanced SDRAM (ESDRAM),Synchlink DRAM (SLDRAM), and direct Rambus RAM (DRRAM). Memory of thedisclosed aspects are intended to comprise, without being limited to,these and other suitable types of memory.

The respective processors (e.g., the processor 112, the processor 118)can facilitate respective analysis of information related tofacilitation of shared DMRS design in a communication network. Theprocessors (e.g., the processor 112, the processor 118) can beprocessors dedicated to analyzing and/or generating informationreceived, processors that control one or more components of thecommunications system 100, and/or processors that both analyze andgenerate information received and control one or more components of thecommunications system 100.

Further, the term network device (e.g., network node, network nodedevice) is used herein to refer to any type of network node servingcommunications devices and/or connected to other network nodes, networkelements, or another network node from which the communications devicescan receive a radio signal. In cellular radio access networks (e.g.,Universal Mobile Telecommunications System (UMTS) networks), networkdevices can be referred to as Base Transceiver Stations (BTS), radiobase station, radio network nodes, base stations, NodeB, eNodeB (e.g.,evolved NodeB), and so on. In 5G terminology, the network nodes can bereferred to as gNodeB (e.g., gNB) devices. Network devices can alsocomprise multiple antennas for performing various transmissionoperations (e.g., Multiple Input Multiple Output (MIMO) operations). Anetwork node can comprise a cabinet and other protected enclosures, anantenna mast, and actual antennas. Network devices can serve severalcells, also called sectors, depending on the configuration and type ofantenna. Examples of network nodes (e.g., network device 102) caninclude but are not limited to: NodeB devices, Base Station (BS)devices, Access Point (AP) devices, TRPs, and Radio Access Network (RAN)devices. The network nodes can also include Multi-Standard Radio (MSR)radio node devices, comprising: an MSR BS, an eNode B, a networkcontroller, a Radio Network Controller (RNC), a Base Station Controller(BSC), a relay, a donor node controlling relay, a Base TransceiverStation (BTS), a transmission point, a transmission node, a Remote RadioUnit (RRU), a Remote Radio Head (RRH), nodes in a Distributed AntennaSystem (DAS), and the like.

The communications system 100 can be configured to dynamically change aDMRS port table according to the duration of PDSCH. For example, thenetwork device 102 (e.g., a gNB) can configure the mobile device 104with one DMRS port table selected from a group of DMRS port tables.Respective DMRS port tables in the group of DMRS port tables can beassociated with a particular length of the PDSCH duration. As DCIindicates the PDSCH duration information, the network device 102 candynamically switch the DMRS table used for a current PDSCH. Table 1below illustrates an example, non-limiting, table for a PDSCH having aduration of two symbols, only a single codeword, and non-slot-basedscheduling. As illustrated in Table 1, a value of 0 can indicate amessage to reuse the DMRS with PDCCH. Thus, a shared DMRS can beutilized for this example port table.

TABLE 1 Table for PDSCH duration of 2 symbols Only single codeword ValueMessage 0 1 layer Reuse DMRS with PDCCH DMRS port-xx 1 1 layer, port 7with Nscid = 0 Separate PDSCH DMRS 2 1 layer, port 8 with Nscid = 0Separate PDSCH DMRS 3 1 layer, port 7 with Nscid = 1 Separate PDSCH DMRS4 1 layer, port 8 with Nscid = 1 Separate PDSCH DMRS 5 2 layers, port 7,8 Separate PDSCH DMRS 6 2 layers, port 9, 10 Separate PDSCH DMRS 7Reserved

Table 2 below illustrates an example, non-limiting, table for a PDSCHhaving a duration of four symbols, only a single codeword, andnon-slot-based scheduling. As illustrated in Table 2, a value of 0 canindicate a message to reuse the DMRS with PDCCH. Thus, a shared DMRS canbe utilized for this example port table.

TABLE 2 Table for PDSCH duration of 4 symbols Only single codeword ValueMessage 0 1 layer Reuse DMRS with PDCCH DMRS port-xx 1 1 layer, port 7with Nscid = 0 Separate PDSCH DMRS 2 1 layer, port 8 with Nscid = 0Separate PDSCH DMRS 3 1 layer, port 7 with Nscid = 1 Separate PDSCH DMRS4 1 layer, port 8 with Nscid = 1 Separate PDSCH DMRS 5 2 layers, ports7-8 Separate PDSCH DMRS 6 3 layers, ports 7-9 Separate PDSCH DMRS 7 4layers, ports 7-10

Table 3 below illustrates an example, non-limiting, table for a PDSCHhaving a duration of seven symbols, and only a single codeword, up torank 4, and non-slot-based scheduling. As illustrated in Table 3, avalue of 0 can indicate a message to reuse the DMRS with PDCCH. Thus, ashared DMRS can be utilized for this example port table.

TABLE 3 Table for mini-slot duration 7 symbols Only single codeword (upto rank 4) Value Message 0 1 layer Reuse DMRS with PDCCH DMRS port-xx 11 layer, port 7 Separate PDSCH DMRS 2 1 layer, port 8 Separate PDSCHDMRS 3 2 layers, ports 7-8 Separate PDSCH DMRS 4 2 layers, ports 9-10Separate PDSCH DMRS 5 3 layers, ports 7-9 Separate PDSCH DMRS 6 4layers, ports 7-10 Separate PDSCH DMRS 7 Reserved

According to an alternative, or additional, implementation, a dynamicindication can be provided by the network device 102, in the DCI, tonotify the mobile device 104 to use shared DMRS or whether a separateDMRS should be used. The detail signaling can be a separately encodedbit in the DCI or can be jointly encoded in the DMRS port indicationbits. The above tables (e.g., Table 1, Table 2, and Table 3) considerthe jointly encoded case where one entry of the DMRS table can be usedto indicate the shared DMRS case where the mobile device 104 can assumethe PDCCH DMRS is reused for PDSCH channel estimation.

When shared DMRS between PDCCH and PDSCH is indicated, the mobile device104 can perform channel estimation based on PDCCH DMRS and can infer thechannel to PDSCH data REs with the assumption of using the same precoderat transmission side. In addition, the mobile device 104 can assume thePDCCH DMRS is transmitted with the same bandwidth of PDSCH resourceallocation.

FIG. 2 illustrates an example, non-limiting representation of a separateDMRS using an example of 2-symbols non-slot-based scheduling inaccordance with one or more embodiments described herein. It is notedthat although this is an example of 2-symbols, a similar principle canbe utilized for other durations.

The horizontal axis represents the OFDM symbols (e.g., 14 symbols,labeled 0 through 13). The vertical axis represents the PhysicalResource Block (PRB). As indicated, for this example, during OFDM symbol4, PDCCH PRBs with DMRS 202 ₁, 202 ₂, 202 ₃, 202 ₄, and 2025 can betransmitted as PRB 4, 5, 6, 7, and 8. Further, during OFDM symbol 4,PDSCH PRBs without DMRS 204 ₁, 204 ₂, 204 ₃, 204 ₄, and 204 ₅ can betransmitted as PRB 1, PRB 2, PRB 3, PRB 9, through PRB #. Further tothis example, during OFDM symbol 5, all PRBS comprise PDSCH PRB withDMRS.

FIG. 3 illustrates an example, non-limiting representation of a sharedDMRS using an example of 2-symbols non-slot-based scheduling inaccordance with one or more embodiments described herein. Repetitivedescription of like elements employed in other embodiments describedherein is omitted for sake of brevity. It is noted that although this isan example of 2-symbols, a similar principle can be utilized for otherdurations.

The horizontal axis represents the OFDM symbols (e.g., 14 symbols,labeled 0 through 13). The vertical axis represents the PhysicalResource Block (PRB). As indicated, for this example, during OFDM symbol4, PDCCH PRBs with DMRS 302 ₁, 302 ₂, 302 ₃, 302 ₄, and 302 ₅ can betransmitted as PRB 4, 5, 6, 7, and 8. Further, during OFDM symbol 4,PDSCH PRBs with DMRS 304 ₁, 304 ₂, 304 ₃, 304 ₄, and 304 ₅ can betransmitted as PRB 1, PRB 2, PRB 3, PRB 9, through PRB #. Further tothis example, during OFDM symbol 5, all PRBs comprise PDSCH PRB withoutDMRS. Accordingly, FIG. 2 and FIG. 3 illustrate the difference ofseparate DMRS (FIG. 2) and shared DMRS (FIG. 3).

FIG. 4 illustrates a block diagram of an example, non-limiting,communications system 400 for dynamically switching between shared DMRSand separated PDSCH DMRS in accordance with one or more embodimentsdescribed herein. Repetitive description of like elements employed inother embodiments described herein is omitted for sake of brevity. Thecommunications system 400 can comprise one or more of the componentsand/or functionality of the communications system 100, and vice versa.

The analysis component 106 can evaluate a usage parameter of the mobiledevice 104 for application of channel DMRS reuse by the mobile device104. The usage parameter can be one or more of a speed of the mobiledevice 104, a rank data of the mobile device 104, and a duration of aPDSCH.

Based on the usage parameter being a speed of the mobile device, a speeddetermination component 402 can measure a current movement speed of themobile device 104. The analysis component 106 can compare the currentmovement speed to ranges of speeds (e.g., speeds between the ranges of 0miles per hour (mph) and 1 mph, 1 mph and 3 mph; 3 mph and 7 mph, and soon; speeds less than 10 miles per hour, between 10 and 70 miles perhour, over 70 miles per hour, and so on). Thus, the analysis component106 can determine if the mobile device is moving at a low speed or ahigh speed. In response to a determination that the speed of the mobiledevice is less than the threshold movement speed, the analysis component106 can determine that the channel DMRS reuse is to be implemented atthe mobile device 104. In this case, the communication component 108 canfacilitate a first transmission to the mobile device 104 to implementthe channel DMRS reuse by the mobile device.

However, if the mobile device is moving at a high speed, the networkdevice 102 can configure the mobile device 104 to utilize the separateDMRS. Thus, in response to another determination that the speed of themobile device 104 is more than the threshold movement speed, theanalysis component 106 can determine that separate channel DMRS's are tobe implemented at the mobile device 104. The communication component 108can facilitate a second transmission to the mobile device to implementusage of separate channel DMRS's.

Based on the usage parameter being rank data of the mobile device, arank determination component 404 can determine the rank data of themobile device 104. If the rank data is less than the threshold rankdata, the analysis component 106 can determine that channel DMRS reuseis to be implemented at the mobile device 104 and the communicationcomponent 108 can facilitate a first transmission to the mobile device104 to implement the channel DMRS reuse by the mobile device. However,if the rank data is more than the threshold rank data, the analysiscomponent 106 can determine that separate channel DMRS's are to beimplemented at the mobile device 104 and the communication component 108can facilitate a second transmission to the mobile device to implementusage of separate channel DMRS's.

Further, in some implementations, the usage parameter can be a durationof a PDSCH, which can be evaluated by a duration determination component406. Thus, the communication component 108 can transmit a DMRS porttable selected from a group of DMRS port tables based on the duration ofthe PDSCH. The DMRS port table can comprise an indication for the mobiledevice to implement the channel DMRS reuse.

Prior to transmission by the communication component 108, in someimplementations, a data structure selection component 408 can select adata structure from a group of data structures (e.g., the example tables(Table 1, Table 2, and Table 3) provided above. The selected datastructure can provide an indication of whether DMRS reuse should beutilized or whether separate DMRS should be utilized.

An advantage of the disclosed aspects comprises a DMRS table that can beadaptively selected (e.g., by the network device 102, by the datastructure selection component 408) according to the duration ofnon-slot-based scheduling. Another advantage is that the disclosedaspects can support dynamically switching between shared DMRS andseparated PDSCH DMRS. For example, when a gNB scheduler (e.g., ascheduler component 410 of the network device 102) knows the currentscheduling fulfills the condition to share DMRS between PDSCH and PDCCH,the scheduler component 410 can dynamically turn-on the shared DMRSbetween PDCCH and PDSCH. Otherwise the scheduler component 410 can turnoff the shared DMRS between PDCCH and PDSCH.

FIG. 5 illustrates an example, non-limiting, method 500 for shared DMRSdesign for control channels in accordance with one or more embodimentsdescribed herein. Repetitive description of like elements employed inother embodiments described herein is omitted for sake of brevity. Themethod 500 can be implemented by a network device of a wireless network,the network device comprising a processor. Alternatively, oradditionally, a machine-readable storage medium can comprise executableinstructions that, when executed by a processor, facilitate performanceof operations for the method 500.

At 502 a usage parameter of a mobile device can be evaluated forapplication of channel DMRS reuse by the mobile device (e.g., via theanalysis component 106). For example, the evaluation can includedetermining whether the usage parameter satisfies a threshold usageparameter or does not satisfy the threshold usage parameter. Thethreshold usage parameter can be determined a priori.

In response to a first determination that the usage parameter satisfiesa threshold usage parameter, at 504, a first transmission can be sent tothe mobile device to be used for implementation of the channel DMRSreuse (e.g., via the communication component 108). Thus, if thethreshold usage parameter is satisfied, the shared DMRS can be utilizedby the mobile device. The channel DMRS reuse can comprise a PDCCH DMRSbeing reused for PDSCH estimation. Further the channel DMRS reuse can beimplemented for both slot based scheduling and non-slot-basedscheduling.

In accordance with an implementation, the first transmission cancomprise transmitting an indication to implement the channel DMRS reuseas a separate encoded bit in a signal that comprises downlink controlinformation. According to another implementation, the first transmissioncan comprise transmitting an indication to implement the channel DMRSreuse as a jointly encoded bit in a DMRS port table that comprises agroup of indication bits including the jointly encoded bit.

Alternatively, in response to a second determination that the usageparameter does not satisfy the threshold usage parameter, at 506, asecond transmission can be sent to the mobile device to be used forimplementation of separate channel DMRS's (e.g., via the communicationcomponent 108). For example, the second transmission can comprise anindication for the mobile device to utilize a first DMRS for a datachannel and a second DMRS for a control channel.

FIG. 6 illustrates an example, non-limiting, method 600 for provisioninga mobile device to use a shared DMRS design or a separate DMRS designfor control channels in accordance with one or more embodimentsdescribed herein. Repetitive description of like elements employed inother embodiments described herein is omitted for sake of brevity. Themethod 600 can be implemented by a network device of a wireless network,the network device comprising a processor. Alternatively, oradditionally, a machine-readable storage medium can comprise executableinstructions that, when executed by a processor, facilitate performanceof operations for the method 600.

At 602, it can be determined that a usage parameter associated with amobile device in a wireless network satisfies a function of a definedusage parameter associated with control channel DMRS reuse (e.g., viathe analysis component 106).

According to an implementation, the determination at 602 can includemeasuring a movement speed of the mobile device, at 604 (e.g., via thespeed determination component 402). The movement speed of the mobiledevice can be a current speed, which can fluctuate over time and can bemeasured at defined intervals, continually, periodically, or based onother time parameters. The current movement speed (e.g., the measuredmovement speed) can be compared, at 606, with a defined movement speedparameter (e.g., via the analysis component 106). Based on adetermination that the movement speed is less than the defined movementspeed parameter, at 608, it can be determined that the shared DMRS isavailable for use by the mobile device (e.g., via the analysis component106).

According to another implementation, the determination at 602 caninclude evaluating channel rank data of the mobile device, at 610 (e.g.,via the rank determination component 404). Rank data, or rankinformation, comprises various combinations of the number of transmitantennas and the number of transmission layers. Channel rank informationis a second order statistic of the channel and does not change fast,unlike precoding matrix or CQI information. The channel rank informationcan be reported by the mobile device as feedback information. The rankinformation can include a rank indicator, which indicates the number ofstreams of information preferred by the mobile device.

Further to this implementation, the channel rank information can becompared, at 612, with a defined channel rank information parameter,such as rank one, for example (e.g., via the analysis component 106).There can be more than one channel rank information parameter, which cancorrespond to the rank indicator included in the channel rankinformation. Based on a determination that the rank data is rank one, at614, the shared DMRS can be determined to be available for use by themobile device (e.g., via the analysis component 106).

In response to a determination (at 608 and/or at 614) that the usageparameter satisfies the function of the defined usage parameter, at 604an indication of usage of a shared DMRS for a data channel and a controlchannel can be transmitted to the mobile device (e.g., via thecommunication component 108).

FIG. 7 illustrates an example, non-limiting, method 700 for utilizationof an adaptive DMRS port table in accordance with one or moreembodiments described herein. Repetitive description of like elementsemployed in other embodiments described herein is omitted for sake ofbrevity. The method 700 can be implemented by a network device of awireless network, the network device comprising a processor.Alternatively, or additionally, a machine-readable storage medium cancomprise executable instructions that, when executed by a processor,facilitate performance of operations for the method 700.

At 702, a duration of a PDSCH can be evaluated (e.g., via the durationdetermination component 406). For example, the duration can be based oneither non-slot based scheduling or slot based scheduling (e.g., twosymbols, four symbols, seven symbols, fourteen symbols). Based on theduration, a DMRS port data structure (e.g., a port table) can beselected from a group of DMRS port data structure, at 704 (e.g., via thedata structure selection component 408). For example, port datastructures in the group of port data structures can be associated withrespective lengths of a PDSCH duration. For example, a first datastructure can be associated with a first length, a second data structurecan be associated with a second table, a third data structure can beassociated with a third data structure, and so on.

The selected DMRS port data structure can be transmitted to the mobiledevice, at 706 (e.g., via the communication component 108). The DMRSport table can comprise the indication for the mobile device to use theshared DMRS for the data channel and the control channel. Alternatively,the DMRS port table can comprise the indication for the mobile device touse separate DMRS's for the data channel and the control channel.

FIG. 8 illustrates an example, non-limiting, method 800 for dynamicallysupporting sharing of DMRS between control channels and data channelsbased on a feedback loop in accordance with one or more embodimentsdescribed herein. Repetitive description of like elements employed inother embodiments described herein is omitted for sake of brevity. Themethod 800 can be implemented by a network device of a wireless network,the network device comprising a processor. Alternatively, oradditionally, a machine-readable storage medium can comprise executableinstructions that, when executed by a processor, facilitate performanceof operations for the method 800.

One or more usage parameters of a mobile device can be obtained at 802(e.g., via the communication component 108 or another system component).Usage parameters can include a movement speed of the mobile device(e.g., how fast the mobile device is being moved), a rank information ofthe mobile device and/or a duration of a PDSCH.

At 804 a determination is made whether a usage parameter satisfies adefined usage parameter (e.g., via the analysis component 106). Forexample, the usage parameter can be a speed of the mobile device and thedefined usage parameter can be based on whether the speed is a low speed(e.g., mobile device is stationary, a user of the mobile device iswalking or traveling at a slow speed in a vehicle) or whether the speedis a high speed (e.g., vehicle is moving at a high rate of speed, suchas on a freeway, mobile device is on a train or in a plane). In otherexamples, the usage parameter can be a rank of the mobile device and/ora duration of a PDSCH.

If the usage parameter satisfies the defined usage parameter (“YES”), at806, an indication of usage of a shared DMRS for a data channel and acontrol channel can be transmitted to the module device (e.g., via thecommunication component 108). In an example, the indication can betransmitted as a separate encoded bit in a signal that comprisesdownlink control information. In another example, the indication can betransmitted as a jointly encoded bit in a DMRS port table that comprisesa group of indication bits including the jointly encoded bit. In yetanother example, the indication can be transmitted as a separate encodedbit in a signal that comprises downlink control information.

If the usage parameter does not satisfy the defined usage parameter(“NO”), at 808, an indication of usage of a separate DMRS's for a datachannel and a control channel can be transmitted to the module device(e.g., via the communication component 108). For example, the indicationcan inform the mobile device to use a first DMRS for the data channeland a second DMRS for a control channel, where the first DMRS and thesecond DMRS are separate signals.

In an example, the indication can be transmitted as a separate encodedbit in a signal that comprises downlink control information. In anotherexample, the indication can be transmitted as a jointly encoded bit in aDMRS port table that comprises a group of indication bits including thejointly encoded bit. In yet another example, the indication can betransmitted as a separate encoded bit in a signal that comprisesdownlink control information.

At 810, one or more updates to the one or more usage parameters can beobtained (e.g., via the communication component 108). For example, theone or more updates can be obtained continually, periodically, based ona trigger event, based on receipt of data from the mobile device, and soon. Upon or after collection of the updates, the method 800 can returnto 804 and another decision can be made a usage parameter satisfies adefined usage parameter (e.g., via the analysis component 106). It is tobe understood that the collection of updates, at 810, and thedetermination, at 804, such that any number of updates and/or changes tothe demodulation reference sign design can be initiated.

Described herein are systems, methods, articles of manufacture, andother embodiments or implementations that can facilitate shared DMRSdesign in a 5G network. Facilitating shared DMRS design in a 5G networkcan be implemented in connection with any type of device with aconnection to the communications network (e.g., a mobile handset, acomputer, a handheld device, etc.) any Internet of things (IoT) device(e.g., toaster, coffee maker, blinds, music players, speakers, etc.),and/or any connected vehicles (cars, airplanes, space rockets, and/orother at least partially automated vehicles (e.g., drones)). In someembodiments, the non-limiting term User Equipment (UE) is used. It canrefer to any type of wireless device that communicates with a radionetwork node in a cellular or mobile communication system. Examples ofUE are target device, device to device (D2D) UE, machine type UE or UEcapable of machine to machine (M2M) communication, PDA, Tablet, mobileterminals, smart phone, Laptop Embedded Equipped (LEE), laptop mountedequipment (LME), USB dongles etc. Note that the terms element, elementsand antenna ports can be interchangeably used but carry the same meaningin this disclosure. The embodiments are applicable to single carrier aswell as to Multi-Carrier (MC) or Carrier Aggregation (CA) operation ofthe UE. The term Carrier Aggregation (CA) is also called (e.g.,interchangeably called) “multi-carrier system,” “multi-cell operation,”“multi-carrier operation,” “multi-carrier” transmission and/orreception.

In some embodiments, the non-limiting term radio network node or simplynetwork node is used. It can refer to any type of network node thatserves one or more UEs and/or that is coupled to other network nodes ornetwork elements or any radio node from where the one or more UEsreceive a signal. Examples of radio network nodes are Node B, BaseStation (BS), Multi-Standard Radio (MSR) node such as MSR BS, eNode B,network controller, Radio Network Controller (RNC), Base StationController (BSC), relay, donor node controlling relay, Base TransceiverStation (BTS), Access Point (AP), transmission points, transmissionnodes, RRU, RRH, nodes in Distributed Antenna System (DAS) etc.

Cloud Radio Access Networks (RAN) can enable the implementation ofconcepts such as Software-Defined Network (SDN) and Network FunctionVirtualization (NFV) in 5G networks. This disclosure can facilitate ageneric channel state information framework design for a 5G network.Certain embodiments of this disclosure can comprise an SDN controllerthat can control routing of traffic within the network and between thenetwork and traffic destinations. The SDN controller can be merged withthe 5G network architecture to enable service deliveries via openApplication Programming Interfaces (APIs) and move the network coretowards an all Internet Protocol (IP), cloud based, and software driventelecommunications network. The SDN controller can work with, or takethe place of Policy and Charging Rules Function (PCRF) network elementsso that policies such as quality of service and traffic management androuting can be synchronized and managed end to end.

To meet the huge demand for data centric applications, 4G standards canbe applied to 5G, also called New Radio (NR) access. 5G networks cancomprise the following: data rates of several tens of megabits persecond supported for tens of thousands of users; 1 gigabit per secondcan be offered simultaneously (or concurrently) to tens of workers onthe same office floor; several hundreds of thousands of simultaneous (orconcurrent) connections can be supported for massive sensor deployments;spectral efficiency can be enhanced compared to 4G; improved coverage;enhanced signaling efficiency; and reduced latency compared to LTE. Inmulticarrier system such as OFDM, each subcarrier can occupy bandwidth(e.g., subcarrier spacing). If the carriers use the same bandwidthspacing, then it can be considered a single numerology. However, if thecarriers occupy different bandwidth and/or spacing, then it can beconsidered a multiple numerology.

Referring now to FIG. 9, illustrated is an example block diagram of anexample mobile handset 900 operable to engage in a system architecturethat facilitates wireless communications according to one or moreembodiments described herein. Although a mobile handset is illustratedherein, it will be understood that other devices can be a mobile device,and that the mobile handset is merely illustrated to provide context forthe embodiments of the various embodiments described herein. Thefollowing discussion is intended to provide a brief, general descriptionof an example of a suitable environment in which the various embodimentscan be implemented. While the description includes a general context ofcomputer-executable instructions embodied on a machine-readable storagemedium, those skilled in the art will recognize that the innovation alsocan be implemented in combination with other program modules and/or as acombination of hardware and software.

Generally, applications (e.g., program modules) can include routines,programs, components, data structures, etc., that perform particulartasks or implement particular abstract data types. Moreover, thoseskilled in the art will appreciate that the methods described herein canbe practiced with other system configurations, includingsingle-processor or multiprocessor systems, minicomputers, mainframecomputers, as well as personal computers, hand-held computing devices,microprocessor-based or programmable consumer electronics, and the like,each of which can be operatively coupled to one or more associateddevices.

A computing device can typically include a variety of machine-readablemedia. Machine-readable media can be any available media that can beaccessed by the computer and includes both volatile and non-volatilemedia, removable and non-removable media. By way of example and notlimitation, computer-readable media can comprise computer storage mediaand communication media. Computer storage media can include volatileand/or non-volatile media, removable and/or non-removable mediaimplemented in any method or technology for storage of information, suchas computer-readable instructions, data structures, program modules, orother data. Computer storage media can include, but is not limited to,RAM, ROM, EEPROM, flash memory or other memory technology, CD ROM,digital video disk (DVD) or other optical disk storage, magneticcassettes, magnetic tape, magnetic disk storage or other magneticstorage devices, or any other medium which can be used to store thedesired information and which can be accessed by the computer.

Communication media typically embodies computer-readable instructions,data structures, program modules, or other data in a modulated datasignal such as a carrier wave or other transport mechanism, and includesany information delivery media. The term “modulated data signal” means asignal that has one or more of its characteristics set or changed insuch a manner as to encode information in the signal. By way of example,and not limitation, communication media includes wired media such as awired network or direct-wired connection, and wireless media such asacoustic, RF, infrared and other wireless media. Combinations of the anyof the above should also be included within the scope ofcomputer-readable media.

The handset includes a processor 902 for controlling and processing allonboard operations and functions. A memory 904 interfaces to theprocessor 902 for storage of data and one or more applications 906(e.g., a video player software, user feedback component software, etc.).Other applications can include voice recognition of predetermined voicecommands that facilitate initiation of the user feedback signals. Theapplications 906 can be stored in the memory 904 and/or in a firmware908, and executed by the processor 902 from either or both the memory904 or/and the firmware 908. The firmware 908 can also store startupcode for execution in initializing the handset 900. A communicationscomponent 910 interfaces to the processor 902 to facilitatewired/wireless communication with external systems, e.g., cellularnetworks, VoIP networks, and so on. Here, the communications component910 can also include a suitable cellular transceiver 911 (e.g., a GSMtransceiver) and/or an unlicensed transceiver 913 (e.g., Wi-Fi, WiMax)for corresponding signal communications. The handset 900 can be a devicesuch as a cellular telephone, a PDA with mobile communicationscapabilities, and messaging-centric devices. The communicationscomponent 910 also facilitates communications reception from terrestrialradio networks (e.g., broadcast), digital satellite radio networks, andInternet-based radio services networks.

The handset 900 includes a display 912 for displaying text, images,video, telephony functions (e.g., a Caller ID function), setupfunctions, and for user input. For example, the display 912 can also bereferred to as a “screen” that can accommodate the presentation ofmultimedia content (e.g., music metadata, messages, wallpaper, graphics,etc.). The display 912 can also display videos and can facilitate thegeneration, editing and sharing of video quotes. A serial I/O interface914 is provided in communication with the processor 902 to facilitatewired and/or wireless serial communications (e.g., USB, and/or IEEE1394) through a hardwire connection, and other serial input devices(e.g., a keyboard, keypad, and mouse). This supports updating andtroubleshooting the handset 900, for example. Audio capabilities areprovided with an audio I/O component 916, which can include a speakerfor the output of audio signals related to, for example, indication thatthe user pressed the proper key or key combination to initiate the userfeedback signal. The audio I/O component 916 also facilitates the inputof audio signals through a microphone to record data and/or telephonyvoice data, and for inputting voice signals for telephone conversations.

The handset 900 can include a slot interface 918 for accommodating a SIC(Subscriber Identity Component) in the form factor of a card SubscriberIdentity Module (SIM) or universal SIM 920, and interfacing the SIM card920 with the processor 902. However, it is to be appreciated that theSIM card 920 can be manufactured into the handset 900, and updated bydownloading data and software.

The handset 900 can process IP data traffic through the communicationscomponent 910 to accommodate IP traffic from an IP network such as, forexample, the Internet, a corporate intranet, a home network, a personarea network, etc., through an ISP or broadband cable provider. Thus,VoIP traffic can be utilized by the handset 900 and IP-based multimediacontent can be received in either an encoded or decoded format.

A video processing component 922 (e.g., a camera) can be provided fordecoding encoded multimedia content. The video processing component 922can aid in facilitating the generation, editing, and sharing of videoquotes. The handset 900 also includes a power source 924 in the form ofbatteries and/or an AC power subsystem, which power source 924 caninterface to an external power system or charging equipment (not shown)by a power I/O component 926.

The handset 900 can also include a video component 930 for processingvideo content received and, for recording and transmitting videocontent. For example, the video component 930 can facilitate thegeneration, editing and sharing of video quotes. A location trackingcomponent 932 facilitates geographically locating the handset 900. Asdescribed hereinabove, this can occur when the user initiates thefeedback signal automatically or manually. A user input component 934facilitates the user initiating the quality feedback signal. The userinput component 934 can also facilitate the generation, editing andsharing of video quotes. The user input component 934 can include suchconventional input device technologies such as a keypad, keyboard,mouse, stylus pen, and/or touchscreen, for example.

Referring again to the applications 906, a hysteresis component 936facilitates the analysis and processing of hysteresis data, which isutilized to determine when to associate with the access point. Asoftware trigger component 938 can be provided that facilitatestriggering of the hysteresis component 936 when the Wi-Fi transceiver913 detects the beacon of the access point. A SIP client 940 enables thehandset 900 to support SIP protocols and register the subscriber withthe SIP registrar server. The applications 906 can also include a client942 that provides at least the capability of discovery, play and storeof multimedia content, for example, music.

The handset 900, as indicated above related to the communicationscomponent 910, includes an indoor network radio transceiver 913 (e.g.,Wi-Fi transceiver). This function supports the indoor radio link, suchas IEEE 802.11, for the dual-mode GSM handset 900. The handset 900 canaccommodate at least satellite radio services through a handset that cancombine wireless voice and digital radio chipsets into a single handhelddevice.

Referring now to FIG. 10, illustrated is an example block diagram of anexample computer 1000 operable to engage in a system architecture thatfacilitates wireless communications according to one or more embodimentsdescribed herein. The computer 1000 can provide networking andcommunication capabilities between a wired or wireless communicationnetwork and a server (e.g., Microsoft server) and/or communicationdevice. In order to provide additional context for various aspectsthereof, FIG. 10 and the following discussion are intended to provide abrief, general description of a suitable computing environment in whichthe various aspects of the innovation can be implemented to facilitatethe establishment of a transaction between an entity and a third party.While the description above is in the general context ofcomputer-executable instructions that can run on one or more computers,those skilled in the art will recognize that the innovation also can beimplemented in combination with other program modules and/or as acombination of hardware and software.

Generally, program modules include routines, programs, components, datastructures, etc., that perform particular tasks or implement particularabstract data types. Moreover, those skilled in the art will appreciatethat the various methods can be practiced with other computer systemconfigurations, including single-processor or multiprocessor computersystems, minicomputers, mainframe computers, as well as personalcomputers, hand-held computing devices, microprocessor-based orprogrammable consumer electronics, and the like, each of which can beoperatively coupled to one or more associated devices.

The illustrated aspects of the innovation can also be practiced indistributed computing environments where certain tasks are performed byremote processing devices that are linked through a communicationsnetwork. In a distributed computing environment, program modules can belocated in both local and remote memory storage devices.

Computing devices typically include a variety of media, which caninclude computer-readable storage media or communications media, whichtwo terms are used herein differently from one another as follows.

Computer-readable storage media can be any available storage media thatcan be accessed by the computer and includes both volatile andnonvolatile media, removable and non-removable media. By way of example,and not limitation, computer-readable storage media can be implementedin connection with any method or technology for storage of informationsuch as computer-readable instructions, program modules, structureddata, or unstructured data. Computer-readable storage media can include,but are not limited to, RAM, ROM, EEPROM, flash memory or other memorytechnology, CD-ROM, digital versatile disk (DVD) or other optical diskstorage, magnetic cassettes, magnetic tape, magnetic disk storage orother magnetic storage devices, or other tangible and/or non-transitorymedia which can be used to store desired information. Computer-readablestorage media can be accessed by one or more local or remote computingdevices, e.g., via access requests, queries or other data retrievalprotocols, for a variety of operations with respect to the informationstored by the medium.

Communications media can embody computer-readable instructions, datastructures, program modules or other structured or unstructured data ina data signal such as a modulated data signal, e.g., a carrier wave orother transport mechanism, and includes any information delivery ortransport media. The term “modulated data signal” or signals refers to asignal that has one or more of its characteristics set or changed insuch a manner as to encode information in one or more signals. By way ofexample, and not limitation, communication media include wired media,such as a wired network or direct-wired connection, and wireless mediasuch as acoustic, RF, infrared and other wireless media.

With reference to FIG. 10, implementing various aspects described hereinwith regards to the end-user device can include a computer 1000, thecomputer 1000 including a processing unit 1004, a system memory 1006 anda system bus 1008. The system bus 1008 couples system componentsincluding, but not limited to, the system memory 1006 to the processingunit 1004. The processing unit 1004 can be any of various commerciallyavailable processors. Dual microprocessors and other multi-processorarchitectures can also be employed as the processing unit 1004.

The system bus 1008 can be any of several types of bus structure thatcan further interconnect to a memory bus (with or without a memorycontroller), a peripheral bus, and a local bus using any of a variety ofcommercially available bus architectures. The system memory 1006includes read-only memory (ROM) 1027 and random access memory (RAM)1012. A basic input/output system (BIOS) is stored in a non-volatilememory 1027 such as ROM, EPROM, EEPROM, which BIOS contains the basicroutines that help to transfer information between elements within thecomputer 1000, such as during start-up. The RAM 1012 can also include ahigh-speed RAM such as static RAM for caching data.

The computer 1000 further includes an internal hard disk drive (HDD)1014 (e.g., EIDE, SATA), which internal hard disk drive 1014 can also beconfigured for external use in a suitable chassis (not shown), amagnetic floppy disk drive (FDD) 1016, (e.g., to read from or write to aremovable diskette 1018) and an optical disk drive 1020, (e.g., readinga CD-ROM disk 1022 or, to read from or write to other high capacityoptical media such as the DVD). The hard disk drive 1014, magnetic diskdrive 1016 and optical disk drive 1020 can be connected to the systembus 1008 by a hard disk drive interface 1024, a magnetic disk driveinterface 1026 and an optical drive interface 1028, respectively. Theinterface 1024 for external drive implementations includes at least oneor both of Universal Serial Bus (USB) and IEEE 1394 interfacetechnologies. Other external drive connection technologies are withincontemplation of the subject innovation.

The drives and their associated computer-readable media providenonvolatile storage of data, data structures, computer-executableinstructions, and so forth. For the computer 1000 the drives and mediaaccommodate the storage of any data in a suitable digital format.Although the description of computer-readable media above refers to aHDD, a removable magnetic diskette, and a removable optical media suchas a CD or DVD, it should be appreciated by those skilled in the artthat other types of media which are readable by a computer 1000, such aszip drives, magnetic cassettes, flash memory cards, cartridges, and thelike, can also be used in the exemplary operating environment, andfurther, that any such media can contain computer-executableinstructions for performing the methods of the disclosed innovation.

A number of program modules can be stored in the drives and RAM 1012,including an operating system 1030, one or more application programs1032, other program modules 1034 and program data 1036. All or portionsof the operating system, applications, modules, and/or data can also becached in the RAM 1012. It is to be appreciated that the innovation canbe implemented with various commercially available operating systems orcombinations of operating systems.

A user can enter commands and information into the computer 1000 throughone or more wired/wireless input devices, e.g., a keyboard 1038 and apointing device, such as a mouse 1040. Other input devices (not shown)can include a microphone, an IR remote control, a joystick, a game pad,a stylus pen, touchscreen, or the like. These and other input devicesare often connected to the processing unit 1004 through an input deviceinterface 1042 that is coupled to the system bus 1008, but can beconnected by other interfaces, such as a parallel port, an IEEE 1394serial port, a game port, a USB port, an IR interface, etc.

A monitor 1044 or other type of display device is also connected to thesystem bus 1008 through an interface, such as a video adapter 1046. Inaddition to the monitor 1044, a computer 1000 typically includes otherperipheral output devices (not shown), such as speakers, printers, etc.

The computer 1000 can operate in a networked environment using logicalconnections by wired and/or wireless communications to one or moreremote computers, such as a remote computer(s) 1048. The remotecomputer(s) 1048 can be a workstation, a server computer, a router, apersonal computer, portable computer, microprocessor-based entertainmentdevice, a peer device or other common network node, and typicallyincludes many or all of the elements described relative to the computer,although, for purposes of brevity, only a memory/storage device 1050 isillustrated. The logical connections depicted include wired/wirelessconnectivity to a local area network (LAN) 1052 and/or larger networks,e.g., a wide area network (WAN) 1054. Such LAN and WAN networkingenvironments are commonplace in offices and companies, and facilitateenterprise-wide computer networks, such as intranets, all of which canconnect to a global communications network, e.g., the Internet.

When used in a LAN networking environment, the computer 1000 isconnected to the local network 1052 through a wired and/or wirelesscommunication network interface or adapter 1056. The adapter 1056 canfacilitate wired or wireless communication to the LAN 1052, which canalso include a wireless access point disposed thereon for communicatingwith the wireless adapter 1056.

When used in a WAN networking environment, the computer 1000 can includea modem 1058, or is connected to a communications server on the WAN1054, or has other means for establishing communications over the WAN1054, such as by way of the Internet. The modem 1058, which can beinternal or external and a wired or wireless device, is connected to thesystem bus 1008 through the input device interface 1042. In a networkedenvironment, program modules depicted relative to the computer, orportions thereof, can be stored in the remote memory/storage device1050. It will be appreciated that the network connections shown areexemplary and other means of establishing a communications link betweenthe computers can be used.

The computer is operable to communicate with any wireless devices orentities operatively disposed in wireless communication, e.g., aprinter, scanner, desktop and/or portable computer, portable dataassistant, communications satellite, any piece of equipment or locationassociated with a wirelessly detectable tag (e.g., a kiosk, news stand,restroom), and telephone. This includes at least Wi-Fi and Bluetooth™wireless technologies. Thus, the communication can be a predefinedstructure as with a conventional network or simply an ad hoccommunication between at least two devices.

Wi-Fi, or Wireless Fidelity, allows connection to the Internet from acouch at home, in a hotel room, or a conference room at work, withoutwires. Wi-Fi is a wireless technology similar to that used in a cellphone that enables such devices, e.g., computers, to send and receivedata indoors and out; anywhere within the range of a base station. Wi-Finetworks use radio technologies called IEEE 802.11 (a, b, g, etc.) toprovide secure, reliable, fast wireless connectivity. A Wi-Fi networkcan be used to connect computers to each other, to the Internet, and towired networks (which use IEEE 802.3 or Ethernet). Wi-Fi networksoperate in the unlicensed 2.4 and 5 GHz radio bands, at an 11 Mbps(802.11a) or 54 Mbps (802.11b) data rate, for example, or with productsthat contain both bands (dual band), so the networks can providereal-world performance similar to the basic 10BaseT wired Ethernetnetworks used in many offices.

An aspect of 5G, which differentiates from previous 4G systems, is theuse of NR. NR architecture can be designed to support multipledeployment cases for independent configuration of resources used forRACH procedures. Since the NR can provide additional services than thoseprovided by LTE, efficiencies can be generated by leveraging the prosand cons of LTE and NR to facilitate the interplay between LTE and NR,as discussed herein.

Reference throughout this specification to “one embodiment,” or “anembodiment,” means that a particular feature, structure, orcharacteristic described in connection with the embodiment is includedin at least one embodiment. Thus, the appearances of the phrase “in oneembodiment,” “in one aspect,” or “in an embodiment,” in various placesthroughout this specification are not necessarily all referring to thesame embodiment. Furthermore, the particular features, structures, orcharacteristics can be combined in any suitable manner in one or moreembodiments.

As used in this disclosure, in some embodiments, the terms “component,”“system,” “interface,” and the like are intended to refer to, orcomprise, a computer-related entity or an entity related to anoperational apparatus with one or more specific functionalities, whereinthe entity can be either hardware, a combination of hardware andsoftware, software, or software in execution, and/or firmware. As anexample, a component can be, but is not limited to being, a processrunning on a processor, a processor, an object, an executable, a threadof execution, computer-executable instructions, a program, and/or acomputer. By way of illustration and not limitation, both an applicationrunning on a server and the server can be a component.

One or more components can reside within a process and/or thread ofexecution and a component can be localized on one computer and/ordistributed between two or more computers. In addition, these componentscan execute from various computer readable media having various datastructures stored thereon. The components can communicate via localand/or remote processes such as in accordance with a signal having oneor more data packets (e.g., data from one component interacting withanother component in a local system, distributed system, and/or across anetwork such as the Internet with other systems via the signal). Asanother example, a component can be an apparatus with specificfunctionality provided by mechanical parts operated by electric orelectronic circuitry, which is operated by a software application orfirmware application executed by one or more processors, wherein theprocessor can be internal or external to the apparatus and can executeat least a part of the software or firmware application. As yet anotherexample, a component can be an apparatus that provides specificfunctionality through electronic components without mechanical parts,the electronic components can comprise a processor therein to executesoftware or firmware that confer(s) at least in part the functionalityof the electronic components. In an aspect, a component can emulate anelectronic component via a virtual machine, e.g., within a cloudcomputing system. While various components have been illustrated asseparate components, it will be appreciated that multiple components canbe implemented as a single component, or a single component can beimplemented as multiple components, without departing from exampleembodiments.

In addition, the words “example” and “exemplary” are used herein to meanserving as an instance or illustration. Any embodiment or designdescribed herein as “example” or “exemplary” is not necessarily to beconstrued as preferred or advantageous over other embodiments ordesigns. Rather, use of the word example or exemplary is intended topresent concepts in a concrete fashion. As used in this application, theterm “or” is intended to mean an inclusive “or” rather than an exclusive“or.” That is, unless specified otherwise or clear from context, “Xemploys A or B” is intended to mean any of the natural inclusivepermutations. That is, if X employs A; X employs B; or X employs both Aand B, then “X employs A or B” is satisfied under any of the foregoinginstances. In addition, the articles “a” and “an” as used in thisapplication and the appended claims should generally be construed tomean “one or more” unless specified otherwise or clear from context tobe directed to a singular form.

Moreover, terms such as “mobile device equipment,” “mobile station,”“mobile,” subscriber station,” “access terminal,” “terminal,” “handset,”“communication device,” “mobile device” (and/or terms representingsimilar terminology) can refer to a wireless device utilized by asubscriber or mobile device of a wireless communication service toreceive or convey data, control, voice, video, sound, gaming orsubstantially any data-stream or signaling-stream. The foregoing termsare utilized interchangeably herein and with reference to the relateddrawings. Likewise, the terms “access point (AP),” “Base Station (BS),”BS transceiver, BS device, cell site, cell site device, “Node B (NB),”“evolved Node B (eNode B),” “home Node B (HNB)” and the like, areutilized interchangeably in the application, and refer to a wirelessnetwork component or appliance that transmits and/or receives data,control, voice, video, sound, gaming or substantially any data-stream orsignaling-stream from one or more subscriber stations. Data andsignaling streams can be packetized or frame-based flows.

Furthermore, the terms “device,” “communication device,” “mobiledevice,” “subscriber,” “customer entity,” “consumer,” “customer entity,”“entity” and the like are employed interchangeably throughout, unlesscontext warrants particular distinctions among the terms. It should beappreciated that such terms can refer to human entities or automatedcomponents supported through artificial intelligence (e.g., a capacityto make inference based on complex mathematical formalisms), which canprovide simulated vision, sound recognition and so forth.

Embodiments described herein can be exploited in substantially anywireless communication technology, comprising, but not limited to,wireless fidelity (Wi-Fi), global system for mobile communications(GSM), universal mobile telecommunications system (UMTS), worldwideinteroperability for microwave access (WiMAX), enhanced general packetradio service (enhanced GPRS), third generation partnership project(3GPP) long term evolution (LTE), third generation partnership project 2(3GPP2) ultra mobile broadband (UMB), high speed packet access (HSPA),Z-Wave, Zigbee and other 802.XX wireless technologies and/or legacytelecommunication technologies.

Systems, methods and/or machine-readable storage media for facilitatinga two-stage downlink control channel for 5G systems are provided herein.Legacy wireless systems such as LTE, Long-Term Evolution Advanced(LTE-A), High Speed Packet Access (HSPA) etc. use fixed modulationformat for downlink control channels. Fixed modulation format impliesthat the downlink control channel format is always encoded with a singletype of modulation (e.g., quadrature phase shift keying (QPSK)) and hasa fixed code rate. Moreover, the forward error correction (FEC) encoderuses a single, fixed mother code rate of 1/3 with rate matching. Thisdesign does not take into the account channel statistics. For example,if the channel from the BS device to the mobile device is very good, thecontrol channel cannot use this information to adjust the modulation,code rate, thereby unnecessarily allocating power on the controlchannel. Similarly, if the channel from the BS to the mobile device ispoor, then there is a probability that the mobile device might not ableto decode the information received with only the fixed modulation andcode rate. As used herein, the term “infer” or “inference” refersgenerally to the process of reasoning about, or inferring states of, thesystem, environment, user, and/or intent from a set of observations ascaptured via events and/or data. Captured data and events can includeuser data, device data, environment data, data from sensors, sensordata, application data, implicit data, explicit data, etc. Inference canbe employed to identify a specific context or action, or can generate aprobability distribution over states of interest based on aconsideration of data and events, for example.

Inference can also refer to techniques employed for composinghigher-level events from a set of events and/or data. Such inferenceresults in the construction of new events or actions from a set ofobserved events and/or stored event data, whether the events arecorrelated in close temporal proximity, and whether the events and datacome from one or several event and data sources. Various classificationschemes and/or systems (e.g., support vector machines, neural networks,expert systems, Bayesian belief networks, fuzzy logic, and data fusionengines) can be employed in connection with performing automatic and/orinferred action in connection with the disclosed subject matter.

In addition, the various embodiments can be implemented as a method,apparatus, or article of manufacture using standard programming and/orengineering techniques to produce software, firmware, hardware, or anycombination thereof to control a computer to implement the disclosedsubject matter. The term “article of manufacture” as used herein isintended to encompass a computer program accessible from anycomputer-readable device, machine-readable device, computer-readablecarrier, computer-readable media, machine-readable media,computer-readable (or machine-readable) storage/communication media. Forexample, computer-readable media can comprise, but are not limited to, amagnetic storage device, e.g., hard disk; floppy disk; magneticstrip(s); an optical disk (e.g., compact disk (CD), a digital video disc(DVD), a Blu-ray Disc™ (BD)); a smart card; a flash memory device (e.g.,card, stick, key drive); and/or a virtual device that emulates a storagedevice and/or any of the above computer-readable media. Of course, thoseskilled in the art will recognize many modifications can be made to thisconfiguration without departing from the scope or spirit of the variousembodiments

The above description of illustrated embodiments of the subjectdisclosure, including what is described in the Abstract, is not intendedto be exhaustive or to limit the disclosed embodiments to the preciseforms disclosed. While specific embodiments and examples are describedherein for illustrative purposes, various modifications are possiblethat are considered within the scope of such embodiments and examples,as those skilled in the relevant art can recognize.

In this regard, while the subject matter has been described herein inconnection with various embodiments and corresponding figures, whereapplicable, it is to be understood that other similar embodiments can beused or modifications and additions can be made to the describedembodiments for performing the same, similar, alternative, or substitutefunction of the disclosed subject matter without deviating therefrom.Therefore, the disclosed subject matter should not be limited to anysingle embodiment described herein, but rather should be construed inbreadth and scope in accordance with the appended claims below.

What is claimed is:
 1. A method, comprising: determining, by network equipment comprising a processor, that a usage parameter associated with a user equipment satisfies a function of a defined usage parameter associated with control channel demodulation reference signal reuse; and in response to a determination that the usage parameter satisfies the function of the defined usage parameter, transmitting, by the network equipment to the user equipment, an indication of usage of a shared demodulation reference signal for a data channel and a control channel.
 2. The method of claim 1, wherein the indication of usage is a first indication, and wherein the method further comprises: in response to determining the usage parameter fails to satisfy the defined usage parameter, transmitting, by the network equipment to the user equipment, a second indication of usage of a first demodulation reference signal for the data channel and a second demodulation reference signal for the control channel.
 3. The method of claim 2, wherein the first demodulation reference signal and the second demodulation reference signal are separate demodulation reference signals.
 4. The method of claim 1, wherein the transmitting the indication of usage comprises transmitting the indication of usage as a separate encoded bit in a signal that comprises downlink control information.
 5. The method of claim 1, wherein the determination is a first determination, wherein the usage parameter is a movement speed of the user equipment, and wherein the method further comprises: measuring, by the network equipment, the movement speed of the user equipment; comparing, by the network equipment, the movement speed with a defined movement speed parameter; and in response to a second determination that the movement speed is less than the defined movement speed parameter, determining, by the network equipment, that the shared demodulation reference signal is available for use by the user equipment.
 6. The method of claim 1, wherein the determination is a first determination, wherein the usage parameter is rank data, and wherein the method further comprises: evaluating, by the network equipment, the rank data associated with the user equipment; and in response to a second determination that the rank data is rank one, determining, by the network equipment, that the shared demodulation reference signal is available for use by the user equipment.
 7. The method of claim 1, wherein the usage parameter is a duration of a physical downlink shared channel, and wherein the method further comprises: determining, by the network equipment, the duration of the physical downlink shared channel; and transmitting, by the network equipment to the user equipment, a demodulation reference signal port table based on the duration of the physical downlink shared channel, wherein the demodulation reference signal port table comprises the indication of usage for the user equipment to use the shared demodulation reference signal for the data channel and the control channel.
 8. The method of claim 1, wherein the control channel demodulation reference signal reuse comprises a downlink control channel demodulation reference signal being reused for physical downlink shared channel estimation.
 9. The method of claim 1, wherein the transmitting the indication of usage of the shared demodulation reference signal comprises transmitting an instruction to implement the control channel demodulation reference signal reuse as a jointly encoded bit in a demodulation reference signal port table that comprises a group of indication bits comprising the jointly encoded bit.
 10. The method of claim 1, wherein the control channel demodulation reference signal reuse is implemented for slot-based scheduling.
 11. The method of claim 1, wherein the control channel demodulation reference signal reuse is implemented for non-slot-based scheduling.
 12. A system, comprising: a processor; and a memory that stores executable instructions that, when executed by the processor, facilitate performance of operations, comprising: evaluating a usage parameter associated with a user equipment device as a function of a defined usage parameter associated with control channel demodulation reference signal reuse; based on a first determination that the usage parameter satisfies the function of the defined usage parameter, conveying, to the user equipment device, a first indication of usage of a shared demodulation reference signal for a data channel and a control channel based on the determining; and based on a second determination that the usage parameter fails to satisfy the function of the defined usage parameter, conveying, to the user equipment device, a second indication of usage of a first demodulation reference signal for the data channel and a second demodulation reference signal for the control channel.
 13. The system of claim 12, wherein the operations further comprise: transmitting the first indication of usage as a separate encoded bit in a signal that comprises downlink control information.
 14. The system of claim 12, wherein the operations further comprise: transmitting, with the first indication of usage, a third indication to implement the control channel demodulation reference signal reuse as a jointly encoded bit in a demodulation reference signal port table that comprises a group of indication bits comprising the jointly encoded bit.
 15. The system of claim 12, wherein the first demodulation reference signal and the second demodulation reference signal are separate demodulation reference signals.
 16. The system of claim 12, wherein the defined usage parameter is a movement speed of the user equipment device.
 17. The system of claim 12, wherein the defined usage parameter is rank data of the user equipment device.
 18. The system of claim 12, wherein the defined usage parameter is a duration of a physical downlink shared channel.
 19. A non-transitory machine-readable medium, comprising executable instructions that, when executed by a processor, facilitate performance of operations, comprising: in response to a first determination that a usage parameter associated with a user equipment satisfies a function of a defined usage parameter associated with control channel demodulation reference signal reuse, facilitating a first transmission to the user equipment, wherein the first transmission comprises a first indication of usage of a shared demodulation reference signal for a data channel and a control channel; and in response to a second determination that the usage parameter fails to satisfy the function of the defined usage parameter, facilitating a second transmission to the user equipment, wherein the second transmission comprises a second indication of usage of a first demodulation reference signal for the data channel and a second demodulation reference signal for the control channel.
 20. The non-transitory machine-readable medium of claim 19, wherein the operations further comprise: transmitting, with the first indication of usage, a third indication to implement the control channel demodulation reference signal reuse as a jointly encoded bit in a demodulation reference signal port table that comprises a group of indication bits comprising the jointly encoded bit. 